Thymine is not present in RNA, only in DNA. The base pairs for RNA are adenine & uracil, and guanine & cytosine. Uracil replaces Thymine in RNA.
Thymine nitrogen base is complementary to Adenine.
Uracil is in RNA and Thyramine is in DNA, the other nitrogen bases are the same In RNA Adenine is complementary to Uracil and Guanine is complementary to cytocine In DNA Adenine is complementarty to Tyramine and Guanine is complentary to cytocine
In DNA thymine is one of the nitrogen bases, but in RNA uracil replaces thymine still leaving four nitrogen bases
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
Thymine nitrogen base is complementary to Adenine.
Thymine is the complementary base for adenine during DNA transcription. During RNA transcription, however, uracil is the complementary base for adenine.
Uracil is in RNA and Thyramine is in DNA, the other nitrogen bases are the same In RNA Adenine is complementary to Uracil and Guanine is complementary to cytocine In DNA Adenine is complementarty to Tyramine and Guanine is complentary to cytocine
Thymine
DNA's four bases are adenine (A), guanine (G), thymine (T), and cytosine (C). Adenine and guanine are complementary, as are thymine and cytosine. RNA is practically the same, except that thymine is replaced with uracil (U) - meaning that when RNA replicates DNA, any thymine needed is replaced with uracil. Uracil is still compatible with cytosine, though.
RNA does not contain the nitrogen base thymine. There are four nitrogen bases in RNA; adenine, guanine, cytosine, and uracil.
Uracil
In DNA thymine is one of the nitrogen bases, but in RNA uracil replaces thymine still leaving four nitrogen bases
The nitrogen base thymine in DNA is replaced by the nitrogen base uracil in RNA.
uracil (U)
No nitrogen base is missing. You may be referring to the fact that DNA contains the nitrogen base thymine, while RNA contains the nitrogen base uracil. They both contain adenine, cytosine, and guanine.